Grease cup.



D. H. TWAITS.

GREASE CUP. APPLICATION FILED MAR. 13. I914.

Patented May 22, 1917.

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DANIEL H. TWAITS, OF CHICAGO, ILLINOIS.

GREASE-CUP.

Specification of Letters Patent.

Patented May 22, 1917.

Application filed March 13, 1914. Serial No. 824,352.

To all whom it may concern:

Be it known that I, DANIEL H. Twarrs, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Grease-Cups, of whichthe following is a full, clear, and exact description, reference beinghad to the accompanying drawings.

This invention is for a grease cup of a type wherein there is a baseportion, a cap carried thereby and a plunger within the cap for forcingthe grease from the interior thereof to the surfaces to be lubricated.

The general object of the invention is to provide such a cup which shallhe very simple in construction, durable and elfic'ient in operation. Amore specific object is to provide a cup in which the cap portion itselfmay be rotated to move the plunger longitudinally therein, therebyavoiding the use of a wing or other means projecting outside the cap tomove the plunger, such as are commonly used in this type of cup. Anotherobject is to so arrange the cup that there is a minimum amount ofmachine threading necessary in its construction.

These and other objects will become apparent in the followingdescription and the essential characteristics are hereinafter set forthin the claims.

Referring to the drawings: Figure 1 is a side elevation of my greasecup; Fig. 2 is a vertical central section through the same; Fig. 3 is ahorizontal section taken on the line 33 of Fig. 2; Fig. 4 is a plan ofthe base member with the cap removed; Fig. 5 is a vertical centralsection showing a modified construction of my grease cup; Fig. 6 is ahorizontal section of the same taken on the line 6-6 of Fig. 5.

In the drawings, 10 indicates a grease cup base having an externalangular portion 11, preferably hexagonal as shown, below which is formeda hollow stem 12, externally threaded as at 14:. The upper portion ofthe base is cup-shaped, having internal threads 15, and openingdownwardly to the passage 16 of the stem,-through which the grease isled to the bearing surfaces. Cooperating with the threads 15 areexternal threads of a bushing 18 preferably having an outwardlyprojecting flange 19, which is knurled as at 20 to provide for screwingthe same into position, the shoulder 21 limiting its downward movement.Instead of the knurl at 20, I may provide any suitable means forrotating this bushing, such as making the exterior thereof angular orproviding lugs or wings thereon, or providing the periphery with holesadapted for the use of a spanner Wrench.

This bushing fits over the cylindrical e.\'- terior of a cap member 2%,allowing the rotation of the cap therein, and the lower end of thebushing engages the upper side of an outwardly turned flange 25, therebyhold- 111g the cap in position but allowing rotation thereof. Within thecap is provided a plunger 26, adapted to be moved toward the base toforce grease from the interior of the cup by means of a screw 28 whichis non-rotatable when the cap is in position. As shown this plungercomprises two metal disks 30, having a threaded engagement with thescrew 28 between which is held a resilient washer-like member 31,adapted to engage the interior of the cap and the threads of the screwto prevent the leakage of grease past the plunger. These disks 30 may beconnected, and secured on either. side of the resilient member, by anysuitable means, such as rivets shown at 32.

The screw 28 is rotatably secured to the top of the cap by means of adisk-like collar- 34-, having a portion of its upper surface formed tofit the interior of the top of the cap as at 35, and secured thereto byany suitable means such as electric welding or rivets 36. This disk isoffset, forming a space for a head 37, upset at the top of the screw tohold. the same'in place, allowing the rotation thereof. When thecap isin position on the base as shown, a non-circular projection 38preferably tapering downwardly, integral with the lower end of thisscrew, fits intoan opening 39 in a non-rotatable washer-like member 40,secured to .the base at 4:1, by any suitable means, such as electricweldmg or rivets 42, as shown.

This washer preferably extends upwardly into the cap as at 43,and thenhas a flat portion 44 through which is made the opening 39. In thisupwardly extending portion 43, may be made perforations 45 of anysuitable shape or size, to allow the passage of grease from the interiorof the cap to the passage 16 of the stem. To rotate the plunger with thecap, I provide vertical ribs on one of these members engagingcorresponding grooves on the other. As shown, the ribs 46 extendinwardly from the cap and engage corresponding vertical grooves 47 inthe plunger 26.

When the cap is in the position shown, having been filled with grease,to force the grease through the stem it is only necessary to rotate thecap, thereby rotating the plunger about the screw 28 in the properdirection to move the plunger downwardly,the screw being held againstrotation by the projection 38 engaging the washer-like member LO,thereby forcing the grease through the opening to the stem.

A suitable knurl 48 provides a suitable hand grip at the upper portionof the cap as well preventing the bushing 19 from becoming removed fromthe cap when being refilled, as the knurled portion extends outwardlyfrom the exterior surface.

Referring to the modified construction shown particularly in Figs. 5 and6, the screw is rigidly carried by the cap, and rotatable therewith,being free at its lower end. It is secured by a disk-like member 50,engaged by an angular portion 51 at the upper end of the screw andsecured to the top of the cap by electric welding or by rivets 52. Thescrew has an upset head 58, securely holding the screw to the diskli keportion 50, which has an offset intermediate portion forminga recess forthis head. Below the disk is a round or circular portion 55 of thescrew, forming a shoulder engaging the under side of the disk andforming a rotatable bearing in a strip 56, extending to the sides of thecap and downwardly as at 57, and having its lower end 58 turnedoutwardly and resting on the bottom of the base. These dependingportions of the strip engage notches 60 in a plunger 61 similar to theplunger above described, and thereby prevent the rotation oithe same,the'strip being held when the cap is in position by the'lower edge 62 ofa bushing 6%, similar to the bushing above described, engaging the endofthe portions 58 and clamping them to the bottom of the cup portion ofthe base.

The cap 65 is similar to the cap above described, except that it has noribs or grooves, and its outwardly turned flange 66 fits into anundercut portion 67 of the bushing 64:, and a shoulder 68 prevents theupward movement of the cap but allows the rotation thereof. In thisconstruction the length of the threaded portion of the bushing is suchthat the under side of the flange 70 does not engage the top of the wallof the base, as in the form above described, but allows the lower edge62 only, to engage the portions 58 of the strips, thereby giving thefull clamping effect and securely holding the strip against rotation. Inthis form the screw 28 is of such a length that it allows the grease topass beneath it through the passage 16 of the stem.

In each of the constructions described, the

screw 28 is shown as supported at its upper end by a separate membersecured to the under side of the top of the cap. This provides forgreater neatness of appearance of the cup, leaving the top smooth. Thatis in the first form, the screw could be rotatably carried by the top ofthe cap, merely having the head 87 upset at the upper side of the cap,while allowing the rotation of the screw. In the other form the screwcould be rigidly secured to the top of the cap by extending it throughand upsetting, or by any other suitable means.

Now when the cap is filled with grease, and secured in position on thebase, the plunger 61 may be forced downwardly to force grease from thecup by rotating the cap, thereby rotating the screw 28. The portions 57of the strips acting as guides to prevent the rotation of the plunger,allows the action of the screw 28 to move the same.

Having thus described my invention, what I claim is:

1. In a grease cup the combination of a base member, a cap memberrotatably carried thereby, a plunger within the cap, a threaded memberextending through and en gaging the plunger, and means whereby theplunger may be moved upon the rotation of the cap. v V

2. In a grease cup. the combination of a base, a cap, a member rotatablyembracing the cap and removably secured to the base, a plunger memberwithin the cap, a threaded member engaging the threads of the plungermember, means for rotating one of said members by the cap, and means forholding the dther member against rotation whereby the plunger movesalong its axis.

3. In a grease cup the. combination. of a base, a cap, a clamping ringrotatably connecting the cap to the base, a plunger member verticallymovable within said cap, a threaded member engaging said plunger, meansfor holding one of" said members against rotation, and means forrotating the other member by the cap whereby the plunger member is movedalong its axis.

4:. In a grease cup the combination of: a'

base having a threaded portion, a cap carried by the base and having anannular shoulder, an annular member cooperating with the threads of thebase and engaging said shoulder allowing the rotation of the cap, aplunger within the cap, and threaded means for moving the plungerconsequent upon the rotation of the cap.

5. In a grease cup the combination of a base member havingan upwardlyextending wall, internal threads on said wall, a. cap carried by thebase, a bushing slidable over the exterior of thecap having threadscooperating with the threads of the basehaving an annular shoulder, ashoulder on the cap engaged thereby, a plunger member within the cap, athreaded member engaging said plunger, and means for holding one of saidmembers against rotation while rotating the other with the cap to movethe plunger along its axis.

6. In a grease cup the combination of a base member having a threadedportion, a cap mounted thereon and having an outwardly turned flange, aring surrounding the cap and having a shoulder engaging said flange andthreads cooperating with the threads of the base whereby the cap isrotatably secured to the base, a plunger member within the cap, athreaded member engaging the plunger, means for holding one of saidmembers against rotation, and means for rotating the other with the capto move the plunger along its axis.

7. In a grease cup the combination of a base member, a cap rotatablycarried thereby, a plunger movable within the cap, and having a centralinternally threaded opening, an externally threaded screw occupying saidopening, means for holding the screw against rotation, and means forrotating the plunger with the cap.

8. In a grease cup the combination of a base member, a cap rotatablycarried by the base, a vertically movable plunger within the cap, meansfor holding it against relative rotation with the cap, a screw extendingthrough and engaging said plunger, and means carried by the base forpreventing the rotation of said screw.

9. In a grease cup the combination of a base having a hollow stem, a caprotatably carried by the base, a plunger within the cap, means forpreventing its rotation with relation to the cap, a screw engaging saidplunger rotatably carried by the top of the cap and having anon-circular projection at its lower end a rigid member carried by thebase and removably engaging said non-circular projection allowing theremoval of the cap b'ut preventing the rotation of the screw.

10. In a grease cup the combination of a base member, a cap memberrotatably carried thereon, a screw mounted axially within the cap, meanscarried by the base preventing the rotation of said screw, a plungermember having a threaded engagement with said screw, one of said membershaving ribs and the other having grooves slidably fitting the samewhereby the plunger may be rotated by the cap.

11. In a grease cup, the combination of a base member, a cap membermounted thereon and having an annular shoulder, and a collar threadedonto the base and engaging said shoulder to hold the cap in positionwhile allowing it to rotate, and a vertically movable plunger within thecap operated by the rotation of the cap.

12. In a grease cup, the combination of a base member having an upwardlyextending cup-shaped portion, a cap member adapted to be carried by thebase and having an outwardly extending annular shoulder, a collarsurrounding the cap member and engaging the threads on the base androtatably engaging said shoulder to hold the cap in position, and avertically movable plunger within the cap operated by the rotation ofthe cap.

In testimony whereof, I hereunto affix my signature in the presence oftwo witnesses.

DANIEL H. TWAITS.

Witnesses:

Gno. A. Rooxwooo, GERTRUDE G. MAHIER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

